Research on the Vibration Characteristics of a Track’s Structure Considering the Viscoelastic Properties of Recycled Composite Sleepers

Applied Sciences

Zhenhang Zhao¹  Chenghui Li¹  Ying Gao² 

[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;School of Railway Engineering, Shijiazhuang Institute of Railway Technology, Shijiazhuang 050041, China;

关键词: composite sleeper;    power flow;    ballasted track;    vibration energy;    viscoelastic properties;   

DOI  :  10.3390/app11010150

来源: DOAJ

【 摘 要 】

In order to investigate the vibration characteristics of a composite sleeper-ballasted track and provide a basis for further popularization, a vehicle–track dynamic coupling model is established and the viscoelastic properties of the composite sleeper are considered. The power flow method is employed to reveal the power flow distribution characteristics of the composite sleeper. The results show that the viscoelastic properties of the composite sleeper have little influence on the rail power and have a greater influence on the power flow of the sleeper and ballast bed in some frequency ranges. The viscoelastic properties of the composite sleeper can effectively improve the calculation accuracy of the track structure’s power flow. Compared with the type-III pre-stressed concrete sleepers widely used in China, composite sleepers consume more energy in the vibration process due to their own physical characteristics, which reduces the power flow transmitted downward and relieves vibration on the ballast bed, especially in the ranges of 80–125 Hz and 250–400 Hz. The temperature change mainly affects the power flow of the composite sleeper in the frequency range above 50 Hz. As the temperature increases, the modulus of the composite sleeper decreases and the vibration reduction effect of the ballast bed is improved.

【 授权许可】

Unknown